4.0 Article

Diversity of polyisoprenoids in ten Okinawan mangroves

Journal

DENDROBIOLOGY
Volume 75, Issue -, Pages 167-175

Publisher

BOGUCKI WYDAWNICTWO NAUKOWE

Keywords

Dolichol; leaf; Okinawan mangrove; polyprenol; root

Funding

  1. Saudi Aramco Okinawa Research Fund for Mangrove Ecosystem Conservation (SAOREFMEC)
  2. Directorate for Research and Community Service, Ministry of Research, Technology and Higher Education, Republic of Indonesia [120/SP2H/PL/Dit.Litabmas/II/2015]

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The distribution and occurrence of polyisoprenoids (dolichols and polyprenols) in the leaves and roots of nine true Okinawan mangroves and the leaves of one associate mangrove were analyzed using two-dimensional thin layer chromatography. In the leaves, the distribution of three types (I, II, and III) of polyprenols and dolichols were detected. (I) The predominance of dolichols over polyprenols (more than 90%) was observed in Avicennia marina, Bruguiera gymnorrhiza, B. gymnorrhiza (yellow leaves), and Rhizophora stylosa. (II) The occurrence of both polyprenols and dolichols is observed in Excoecaria agallocha, Kandelia obovata, K. obovata (yellow leaves), Lumnitzera racemosa, Pemphis acidula, and Sonneratia alba. (III) The predominance of polyprenols over dolichols (more than 90%) is observed in Heritiera littoralis and Hibiscus tiliaceus. However, in the roots, a type-I distribution was observed in A. marina, B. gymnorrhiza, E. agallocha, H. littoralis and S. alba. A type-II distribution was observed in K. obovata, L. racemosa, P. acidula, and R. stylosa with no type-III distribution. The chain-length distribution of dolichols in the leaves and roots was C-50-C-140 and C-60-C-120, respectively. A similar chain-length distribution of polyprenols of C-45-C-140 and C-65-C-85 was detected in the leaves and roots respectively. Taken together, sixteen out of twenty-one tissues indicated that dolichols are more abundant than polyprenols in both leaves and roots. The present study is the first to clarify the diversity of polyisoprenoids in both the leaves and roots of mangrove, suggesting the chemotaxonomic significance of polyisoprenoids in the mangrove tree species.

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